I am not a Dish user, I am locked into DirecTV and unlikley to change. But I have friends with Dish and I like to keep current on its capabilities. I was reading another forum where somone had the your same problem with a Pathway and 2 receivers. There are apparently a couple of tricks to getting this to work correctly. But it does work. You will be limited to the second receiver only watching channels which come off the satellite pointed to by the primary receiver, but that is just a limitation of a single LNB antenna.
Give this a read and see if it helps
Clicky